I think everyone will agree that Liverpool would move up in the rankings if they ever got their new stadium at Stanley Park built. Anfield is just small. Which goes back to the because if only they had the money to get the new stadium.

When ranking by % of capacity, 9 of the top 15 are English clubs. 4 are German sides, 1 Dutch and 1 Spanish. Not surprising is that all 15 teams are in their respective top domestic divisions. In total, 45 teams have average attendance in excess of 90%.